System to measure the angle position of a large rotating ring structure

Request Number N271088
Author Siemens
Need details

Siemens Healthineers is looking for a cost optimized solution to measure the dynamic angle position of a CT gantry. The position information is used for image reconstruction and motion control.



State-of-the-art CT gantrieshave a rotating ring that moves the measurement system around the patient. It is a continuous movement with rotation speeds up to 320 U/min during which an x-ray based scan of the patient is performed.


The current state-of-the-art is having markers on the Gantry, either directly within the Gantry structure or on a carrier structure that is sampled by optical or inductive sensors.


Key Success Criteria

We are seeking partners that can provide a solution meeting the following criteria
·      Fit to CT Gantry geometry with the inner (open) diameter of the ring is around 900mm; the outer diameter is around 1800mm

·      Measure angle with a maximum absolute Deviation ±0.01 degree
·      Solution can scale to deliver orders of 1000 p.a.


Possible Approaches

Approaches that would drastically simplify the sensor are of special interest. Approaches that can be used to control a direct drive of the ring would be of additional interest.


Approaches not of interest

Preferred Collaboration types
  • Technology Licensing
  • Supply Agreement
  • To Be Negotiated
Items to be submitted

We are looking for concise, non-confidential proposals. The proposal should:

  • Describe the technical approach
  • Include a description of the responding organisation or team and their experience.

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Point of Contact
Stephen Clulow
Area of Interest
  • Electronics & Electronic Components
  • Medical Products & Services
Due Date
March 31, 2017
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